|
|
|
| PRACTICES AND UNDERSTANDINGS ON BLASTING OF FROZEN GROUND YAN G N ian-hua |
| YAN G N ian-hua |
| China Academy of Railway Sciences |
|
|
|
|
Abstract Based on the practical example on blasting of certain frozen ground，the advantages and disadvantages of different methods for drilling the blast hole in frozen ground are introduced. The principles for determini ng and selecting the blasting parameters under different conditions of frozen depth are summarized-Especially，the intensive seismic response during the balsting fo forzen ground has been investigated and studied. Furthermore，on the basis of improving the blasting technique，the seismic vibration due to the blasting of frozen ground may be reduced greatly， and the efeective control of seismic vibration harms due to blasting m ay be obtai ned.
|
|
Received: 31 October 2000
|
|
|
|
|
|
|
|
|
2000, Vol. 17 
